diff --git a/app/services/shixuns/create_shixun_service.rb b/app/services/shixuns/create_shixun_service.rb
index 0bf8d233c..c85455901 100644
--- a/app/services/shixuns/create_shixun_service.rb
+++ b/app/services/shixuns/create_shixun_service.rb
@@ -46,7 +46,7 @@ class CreateShixunService < ApplicationService
         if shixun.is_jupyter?
           folder = EduSetting.get('shixun_folder')
           path = "#{folder}/#{identifier}"
-          FileUtils.mkdir_p(path, :mode => 0777) unless File.directory?(dir)
+          FileUtils.mkdir_p(path, :mode => 0777) unless File.directory?(path)
         end
         return shixun
       end